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-rw-r--r--cpu/mpc8260/spi.c435
1 files changed, 0 insertions, 435 deletions
diff --git a/cpu/mpc8260/spi.c b/cpu/mpc8260/spi.c
deleted file mode 100644
index f5d2ac3..0000000
--- a/cpu/mpc8260/spi.c
+++ /dev/null
@@ -1,435 +0,0 @@
-/*
- * Copyright (c) 2001 Navin Boppuri / Prashant Patel
- * <nboppuri@trinetcommunication.com>,
- * <pmpatel@trinetcommunication.com>
- * Copyright (c) 2001 Gerd Mennchen <Gerd.Mennchen@icn.siemens.de>
- * Copyright (c) 2001-2003 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * MPC8260 CPM SPI interface.
- *
- * Parts of this code are probably not portable and/or specific to
- * the board which I used for the tests. Please send fixes/complaints
- * to wd@denx.de
- *
- */
-
-#include <common.h>
-#include <asm/cpm_8260.h>
-#include <linux/ctype.h>
-#include <malloc.h>
-#include <post.h>
-#include <net.h>
-
-#if defined(CONFIG_SPI)
-
-/* Warning:
- * You cannot enable DEBUG for early system initalization, i. e. when
- * this driver is used to read environment parameters like "baudrate"
- * from EEPROM which are used to initialize the serial port which is
- * needed to print the debug messages...
- */
-#undef DEBUG
-
-#define SPI_EEPROM_WREN 0x06
-#define SPI_EEPROM_RDSR 0x05
-#define SPI_EEPROM_READ 0x03
-#define SPI_EEPROM_WRITE 0x02
-
-/* ---------------------------------------------------------------
- * Offset for initial SPI buffers in DPRAM:
- * We need a 520 byte scratch DPRAM area to use at an early stage.
- * It is used between the two initialization calls (spi_init_f()
- * and spi_init_r()).
- * The value 0x2000 makes it far enough from the start of the data
- * area (as well as from the stack pointer).
- * --------------------------------------------------------------- */
-#ifndef CONFIG_SYS_SPI_INIT_OFFSET
-#define CONFIG_SYS_SPI_INIT_OFFSET 0x2000
-#endif
-
-#define CPM_SPI_BASE 0x100
-
-#ifdef DEBUG
-
-#define DPRINT(a) printf a;
-/* -----------------------------------------------
- * Helper functions to peek into tx and rx buffers
- * ----------------------------------------------- */
-static const char * const hex_digit = "0123456789ABCDEF";
-
-static char quickhex (int i)
-{
- return hex_digit[i];
-}
-
-static void memdump (void *pv, int num)
-{
- int i;
- unsigned char *pc = (unsigned char *) pv;
-
- for (i = 0; i < num; i++)
- printf ("%c%c ", quickhex (pc[i] >> 4), quickhex (pc[i] & 0x0f));
- printf ("\t");
- for (i = 0; i < num; i++)
- printf ("%c", isprint (pc[i]) ? pc[i] : '.');
- printf ("\n");
-}
-#else /* !DEBUG */
-
-#define DPRINT(a)
-
-#endif /* DEBUG */
-
-/* -------------------
- * Function prototypes
- * ------------------- */
-void spi_init (void);
-
-ssize_t spi_read (uchar *, int, uchar *, int);
-ssize_t spi_write (uchar *, int, uchar *, int);
-ssize_t spi_xfer (size_t);
-
-/* -------------------
- * Variables
- * ------------------- */
-
-#define MAX_BUFFER 0x104
-
-/* ----------------------------------------------------------------------
- * Initially we place the RX and TX buffers at a fixed location in DPRAM!
- * ---------------------------------------------------------------------- */
-static uchar *rxbuf =
- (uchar *)&((immap_t *)CONFIG_SYS_IMMR)->im_dprambase
- [CONFIG_SYS_SPI_INIT_OFFSET];
-static uchar *txbuf =
- (uchar *)&((immap_t *)CONFIG_SYS_IMMR)->im_dprambase
- [CONFIG_SYS_SPI_INIT_OFFSET+MAX_BUFFER];
-
-/* **************************************************************************
- *
- * Function: spi_init_f
- *
- * Description: Init SPI-Controller (ROM part)
- *
- * return: ---
- *
- * *********************************************************************** */
-void spi_init_f (void)
-{
- unsigned int dpaddr;
-
- volatile spi_t *spi;
- volatile immap_t *immr;
- volatile cpm8260_t *cp;
- volatile cbd_t *tbdf, *rbdf;
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8260_t *) &immr->im_cpm;
-
- *(ushort *)(&immr->im_dprambase[PROFF_SPI_BASE]) = PROFF_SPI;
- spi = (spi_t *)&immr->im_dprambase[PROFF_SPI];
-
-/* 1 */
- /* ------------------------------------------------
- * Initialize Port D SPI pins
- * (we are only in Master Mode !)
- * ------------------------------------------------ */
-
- /* --------------------------------------------
- * GPIO or per. Function
- * PPARD[16] = 1 [0x00008000] (SPIMISO)
- * PPARD[17] = 1 [0x00004000] (SPIMOSI)
- * PPARD[18] = 1 [0x00002000] (SPICLK)
- * PPARD[12] = 0 [0x00080000] -> GPIO: (CS for ATC EEPROM)
- * -------------------------------------------- */
- immr->im_ioport.iop_ppard |= 0x0000E000; /* set bits */
- immr->im_ioport.iop_ppard &= ~0x00080000; /* reset bit */
-
- /* ----------------------------------------------
- * In/Out or per. Function 0/1
- * PDIRD[16] = 0 [0x00008000] -> PERI1: SPIMISO
- * PDIRD[17] = 0 [0x00004000] -> PERI1: SPIMOSI
- * PDIRD[18] = 0 [0x00002000] -> PERI1: SPICLK
- * PDIRD[12] = 1 [0x00080000] -> GPIO OUT: CS for ATC EEPROM
- * ---------------------------------------------- */
- immr->im_ioport.iop_pdird &= ~0x0000E000;
- immr->im_ioport.iop_pdird |= 0x00080000;
-
- /* ----------------------------------------------
- * special option reg.
- * PSORD[16] = 1 [0x00008000] -> SPIMISO
- * PSORD[17] = 1 [0x00004000] -> SPIMOSI
- * PSORD[18] = 1 [0x00002000] -> SPICLK
- * ---------------------------------------------- */
- immr->im_ioport.iop_psord |= 0x0000E000;
-
- /* Initialize the parameter ram.
- * We need to make sure many things are initialized to zero
- */
- spi->spi_rstate = 0;
- spi->spi_rdp = 0;
- spi->spi_rbptr = 0;
- spi->spi_rbc = 0;
- spi->spi_rxtmp = 0;
- spi->spi_tstate = 0;
- spi->spi_tdp = 0;
- spi->spi_tbptr = 0;
- spi->spi_tbc = 0;
- spi->spi_txtmp = 0;
-
- /* Allocate space for one transmit and one receive buffer
- * descriptor in the DP ram
- */
-#ifdef CONFIG_SYS_ALLOC_DPRAM
- dpaddr = m8260_cpm_dpalloc (sizeof(cbd_t)*2, 8);
-#else
- dpaddr = CPM_SPI_BASE;
-#endif
-
-/* 3 */
- /* Set up the SPI parameters in the parameter ram */
- spi->spi_rbase = dpaddr;
- spi->spi_tbase = dpaddr + sizeof (cbd_t);
-
- /***********IMPORTANT******************/
-
- /*
- * Setting transmit and receive buffer descriptor pointers
- * initially to rbase and tbase. Only the microcode patches
- * documentation talks about initializing this pointer. This
- * is missing from the sample I2C driver. If you dont
- * initialize these pointers, the kernel hangs.
- */
- spi->spi_rbptr = spi->spi_rbase;
- spi->spi_tbptr = spi->spi_tbase;
-
-/* 4 */
- /* Init SPI Tx + Rx Parameters */
- while (cp->cp_cpcr & CPM_CR_FLG)
- ;
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_SPI_PAGE, CPM_CR_SPI_SBLOCK,
- 0, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG)
- ;
-
-/* 6 */
- /* Set to big endian. */
- spi->spi_tfcr = CPMFCR_EB;
- spi->spi_rfcr = CPMFCR_EB;
-
-/* 7 */
- /* Set maximum receive size. */
- spi->spi_mrblr = MAX_BUFFER;
-
-/* 8 + 9 */
- /* tx and rx buffer descriptors */
- tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
- rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
-
- tbdf->cbd_sc &= ~BD_SC_READY;
- rbdf->cbd_sc &= ~BD_SC_EMPTY;
-
- /* Set the bd's rx and tx buffer address pointers */
- rbdf->cbd_bufaddr = (ulong) rxbuf;
- tbdf->cbd_bufaddr = (ulong) txbuf;
-
-/* 10 + 11 */
- immr->im_spi.spi_spie = SPI_EMASK; /* Clear all SPI events */
- immr->im_spi.spi_spim = 0x00; /* Mask all SPI events */
-
-
- return;
-}
-
-/* **************************************************************************
- *
- * Function: spi_init_r
- *
- * Description: Init SPI-Controller (RAM part) -
- * The malloc engine is ready and we can move our buffers to
- * normal RAM
- *
- * return: ---
- *
- * *********************************************************************** */
-void spi_init_r (void)
-{
- volatile spi_t *spi;
- volatile immap_t *immr;
- volatile cpm8260_t *cp;
- volatile cbd_t *tbdf, *rbdf;
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8260_t *) &immr->im_cpm;
-
- spi = (spi_t *)&immr->im_dprambase[PROFF_SPI];
-
- /* tx and rx buffer descriptors */
- tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
- rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
-
- /* Allocate memory for RX and TX buffers */
- rxbuf = (uchar *) malloc (MAX_BUFFER);
- txbuf = (uchar *) malloc (MAX_BUFFER);
-
- rbdf->cbd_bufaddr = (ulong) rxbuf;
- tbdf->cbd_bufaddr = (ulong) txbuf;
-
- return;
-}
-
-/****************************************************************************
- * Function: spi_write
- **************************************************************************** */
-ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
-{
- int i;
-
- memset(rxbuf, 0, MAX_BUFFER);
- memset(txbuf, 0, MAX_BUFFER);
- *txbuf = SPI_EEPROM_WREN; /* write enable */
- spi_xfer(1);
- memcpy(txbuf, addr, alen);
- *txbuf = SPI_EEPROM_WRITE; /* WRITE memory array */
- memcpy(alen + txbuf, buffer, len);
- spi_xfer(alen + len);
- /* ignore received data */
- for (i = 0; i < 1000; i++) {
- *txbuf = SPI_EEPROM_RDSR; /* read status */
- txbuf[1] = 0;
- spi_xfer(2);
- if (!(rxbuf[1] & 1)) {
- break;
- }
- udelay(1000);
- }
- if (i >= 1000) {
- printf ("*** spi_write: Time out while writing!\n");
- }
-
- return len;
-}
-
-/****************************************************************************
- * Function: spi_read
- **************************************************************************** */
-ssize_t spi_read (uchar *addr, int alen, uchar *buffer, int len)
-{
- memset(rxbuf, 0, MAX_BUFFER);
- memset(txbuf, 0, MAX_BUFFER);
- memcpy(txbuf, addr, alen);
- *txbuf = SPI_EEPROM_READ; /* READ memory array */
-
- /*
- * There is a bug in 860T (?) that cuts the last byte of input
- * if we're reading into DPRAM. The solution we choose here is
- * to always read len+1 bytes (we have one extra byte at the
- * end of the buffer).
- */
- spi_xfer(alen + len + 1);
- memcpy(buffer, alen + rxbuf, len);
-
- return len;
-}
-
-/****************************************************************************
- * Function: spi_xfer
- **************************************************************************** */
-ssize_t spi_xfer (size_t count)
-{
- volatile immap_t *immr;
- volatile cpm8260_t *cp;
- volatile spi_t *spi;
- cbd_t *tbdf, *rbdf;
- int tm;
-
- DPRINT (("*** spi_xfer entered ***\n"));
-
- immr = (immap_t *) CONFIG_SYS_IMMR;
- cp = (cpm8260_t *) &immr->im_cpm;
-
- spi = (spi_t *)&immr->im_dprambase[PROFF_SPI];
-
- tbdf = (cbd_t *) & immr->im_dprambase[spi->spi_tbase];
- rbdf = (cbd_t *) & immr->im_dprambase[spi->spi_rbase];
-
- /* Board-specific: Set CS for device (ATC EEPROM) */
- immr->im_ioport.iop_pdatd &= ~0x00080000;
-
- /* Setting tx bd status and data length */
- tbdf->cbd_sc = BD_SC_READY | BD_SC_LAST | BD_SC_WRAP;
- tbdf->cbd_datlen = count;
-
- DPRINT (("*** spi_xfer: Bytes to be xferred: %d ***\n",
- tbdf->cbd_datlen));
-
- /* Setting rx bd status and data length */
- rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP;
- rbdf->cbd_datlen = 0; /* rx length has no significance */
-
- immr->im_spi.spi_spmode = SPMODE_REV |
- SPMODE_MSTR |
- SPMODE_EN |
- SPMODE_LEN(8) | /* 8 Bits per char */
- SPMODE_PM(0x8) ; /* medium speed */
- immr->im_spi.spi_spie = SPI_EMASK; /* Clear all SPI events */
- immr->im_spi.spi_spim = 0x00; /* Mask all SPI events */
-
- /* start spi transfer */
- DPRINT (("*** spi_xfer: Performing transfer ...\n"));
- immr->im_spi.spi_spcom |= SPI_STR; /* Start transmit */
-
- /* --------------------------------
- * Wait for SPI transmit to get out
- * or time out (1 second = 1000 ms)
- * -------------------------------- */
- for (tm=0; tm<1000; ++tm) {
- if (immr->im_spi.spi_spie & SPI_TXB) { /* Tx Buffer Empty */
- DPRINT (("*** spi_xfer: Tx buffer empty\n"));
- break;
- }
- if ((tbdf->cbd_sc & BD_SC_READY) == 0) {
- DPRINT (("*** spi_xfer: Tx BD done\n"));
- break;
- }
- udelay (1000);
- }
- if (tm >= 1000) {
- printf ("*** spi_xfer: Time out while xferring to/from SPI!\n");
- }
- DPRINT (("*** spi_xfer: ... transfer ended\n"));
-
-#ifdef DEBUG
- printf ("\nspi_xfer: txbuf after xfer\n");
- memdump ((void *) txbuf, 16); /* dump of txbuf before transmit */
- printf ("spi_xfer: rxbuf after xfer\n");
- memdump ((void *) rxbuf, 16); /* dump of rxbuf after transmit */
- printf ("\n");
-#endif
-
- /* Clear CS for device */
- immr->im_ioport.iop_pdatd |= 0x00080000;
-
- return count;
-}
-#endif /* CONFIG_SPI */
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